3215565 has 16 divisors (see below), whose sum is σ = 5716800. Its totient is φ = 1714896.

The previous prime is 3215543. The next prime is 3215587. The reversal of 3215565 is 5655123.

It is an interprime number because it is at equal distance from previous prime (3215543) and next prime (3215587).

It is not a de Polignac number, because 3215565 - 2⁸ = 3215309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

3215565 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11775 + ... + 12044.

It is an arithmetic number, because the mean of its divisors is an integer number (357300).

Almost surely, 2^3215565 is an apocalyptic number.

It is an amenable number.

3215565 is a deficient number, since it is larger than the sum of its proper divisors (2501235).

3215565 is a wasteful number, since it uses less digits than its factorization.

3215565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23833 (or 23827 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 3215565 is about 1793.1996542494. The cubic root of 3215565 is about 147.5997984001.

It can be divided in two parts, 321 and 5565, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 3215565 in words is "three million, two hundred fifteen thousand, five hundred sixty-five".